Integrated Approach to Energy-Efficient Building Design: Setting the Context Pierre Jaboyedoff Seminar on Sustainable Architecture: Integrated Approach to Energy-Efficient Building Design New Delhi July 23, 2013
Indian Context Unprecedented Growth in the Building Stock Demographic growth Urbanisation Sustained economic growth Unprecedented growth in the Building sector 2
Building Stock Being Doubled Approx. Every 20 Years 35 Estimations of the Indian Building Stock until 2050 30 25 Billion (m2) 20 15 10 Residential Buildings Commercial Buildings 5 0 2,005 2005 2,010 2010 2,020 2020 2,030 2030 2,040 2040 2,050 2050 Built-up area Germany + France
Residential & Commercial Buildings Account for 34% of the Electricity Consumption (2010-11) Source: Energy Statistics -2012, Ministry of Statistics and Programme Implementation, GoI 4
Electricity Consumption in Residential and Commercial Buildings has Shown Highest Rate of Increase 3.5 Increase in final electricity consumption per sector in India since 1992 (base 1992) 3 2.5 Multiplying factor 2 1.5 1 Residential Sector Commercial Sector Transport Industry Agriculture 0.5 0 1992 1995 2000 2005 2008 5
Large Potential for Energy Savings through Better Design by following an Integrated Design Approach 6
Large Potential for Energy Savings by Following an Integrated Design Approach Benchmark EPIs for Indian Commercial Buildings Measured high performance buildings Source: Satish Kumar: Presentation Improving building sector energy efficiency in India: Strategies & Initiatives July 7, 2010 7
Basic Features of Integrated Approach to Energy-Efficient Building Design 1. Consideration of Climate, Comfort and Energy as basic design parameters from the beginning of the project i.e. from the early-design phase 2. Follows an interactive and iterative design approach involving architects,various types of engineers and expert use of modern simulation tools 8
Early Intervention Allows for Cost Effective Energy Efficient Building Design Concept design Schematic design Design development Construction drawings Construction Commissioning > Integrated design process charrette < Energy saving potential Client Architect Structural Engineer HVAC Engineer Green/Energy Consultant Efforts / Costs 9
Design Charrettes as a Tool to Implement Integrated Design Approach Approach followed Design as per the climate reduce heating/cooling/ligh ting loads through better envelope and fenestration design Design efficient space conditioning and lighting systems Utilizing on-site renewable energy production Strategy 1. Efficient solar gains management Strategy 2. Daylighting (less artificial lighting, visual qualitly) Strategy 3. Thermal inertia Strategy 5. Building envelope performance and quality Efficient shading (Outside movable blinds,...) Strategy 4. Natural ventilation Strategy 6. Mechanical ventilation with heat recovery, desiccant etc... Shallow floor plates Strategy 7. Energy production/supply with low CO2 or even neutral 10
Integrated Design Approach has Contributed in the Success of the Swiss Building Energy Efficiency Programme 1973 oil shock 1979 First Building Envelope Code (180/1) Introduction of building envelope calculation programmes 1981 Heat recovery of ventilation compulsary Market for peripheral insulation Market for double glazing Building tightness Market for efficient AHU 1985 First Energy Building Code SIA 380/1 Introduction of energy balance programmes Mastering Solar Heat Gains Capacity building (Integrated design) 1991 Cooling Justification Code SIA 382/3 Introduction of dynamic simulation Market for high performance glazings Market for high insulation 1991 Energie 2000 Programme Advanced design concepts Market enters (banks with lower mortgage rate,...) Renovation of existing buildings with almost similar specifications Energy efficiency of existing public buildings Market for energy management and optimisation (not only facility management) High energy performance labelling Market response (Government buildings, and image for corporate) 11
Swiss Norms for Energy Use for Heating Buildings (1975-2009) : A Sharp Decline 12
Indo-Swiss Building Energy Efficiency Project (BEEP) Four Components Component 1: To promote an integrated design approach with a focus on energy efficiency at an early stage on large projects Component 2: To reinforce insulation materials testing procedures Component 3: A.To develop design guidelines and a Minergie-India label for residential buildings; B.To prepare design templates for public buildings in selected states Component 4: To build capacity and disseminate knowledge 13
About the Seminar First seminar in a series of 16 seminars to be organised through-out the country. Target Audience builders, developers, architects, service engineers, building contractors, green building consultants, academicians, and students of architecture and engineering Objectives Showcase practical cases of sustainable architecture in Switzerland and India. Create awareness about integrated design and energy efficient building concepts. Disseminate results from actual cases of integrated design charrettes. Facilitate exchange of knowledge and views on the integrated design process and on new, innovative technologies and indigenous strategies. 14
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